Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccc95a229cc26c6…

MALICIOUS

PDF

71.1 KB Created: 2021-05-08 12:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c03e7e6c182fa0492b518b7e63a8443 SHA-1: ca22c14a0ab913bb75c9d2692600952151b4d856 SHA-256: 0ccc95a229cc26c643dbd5e868d372c50203c3b2c1e02e89644126b4c0bb9d39
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/strik?utm_term=kikuyu+catholic+prayer+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457604/normal_5fedbf1342c8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457006/normal_5fe367bca7cdf.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/ap_seminar_imp_rubric_with_scoring_notes.pdfIn PDF document text
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/9353641.pdfIn PDF document text
    • http://nositadox.mypressonline.com/43063331511.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/homo_deus_a_brief_history_of_tomorrow_summary.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/741fb.pdfIn PDF document text
    • http://fodosokidorakig.22web.org/2271576379.pdfIn PDF document text
    • https://bewodopogogubak.weebly.com/uploads/1/3/4/8/134886142/9578795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_601116b4b363e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_081e2f31d0d54dcb8ab65e4b1aea8551.pdf?index=trueIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_429909f95b644efaa05246dcc3045f71.pdf?index=trueIn PDF document text
    • https://e0529b0e-ffd4-46ae-8a9e-348c3aa8e3ae.filesusr.com/ugd/27320f_e54cfa1208a74d35a02bb9a5e705fdcf.pdf?index=trueIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/bodybuilding_workout_plan_for_beginners.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_9ec7330fab7743abae36da40c6c8b80c.pdf?index=trueIn PDF document text
    • http://mobotifiriw.epizy.com/evan_almighty_full_movie_free_hd.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_2cb79605d3ec46148b7ccef92e329479.pdf?index=trueIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_629dc2d753ef4cdc94c9e445dca03854.pdf?index=trueIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_92cfaa1610014dfcba99300ba5a7f947.pdf?index=trueIn PDF document text
    • http://nugoxasozuvazet.rf.gd/does_oxidation_occur_only_at_the_anode.pdfIn PDF document text
    • http://tutufot.rf.gd/ankusham_old_movie_songs.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BA 5340 bytes
SHA-256: 3b7c0680a9810561f7dec4a47026731a7e45a675bbbb42c4ee6aacc69140037d
font_01_sfnt_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 11812 bytes
SHA-256: 8882f3c170643fea25c6582e6fc137df113f50bae220d7b9fc372682fc16246e